From 66d857b08b8c3ed5c72c361f863cce77d2a978d7 Mon Sep 17 00:00:00 2001
From: Greg Ungerer <gerg@uclinux.org>
Date: Tue, 22 Mar 2011 13:39:27 +1000
Subject: m68k: merge m68k and m68knommu arch directories

There is a lot of common code that could be shared between the m68k
and m68knommu arch branches. It makes sense to merge the two branches
into a single directory structure so that we can more easily share
that common code.

This is a brute force merge, based on a script from Stephen King
<sfking@fdwdc.com>, which was originally written by Arnd Bergmann
<arnd@arndb.de>.

> The script was inspired by the script Sam Ravnborg used to merge the
> includes from m68knommu. For those files common to both arches but
> differing in content, the m68k version of the file is renamed to
> <file>_mm.<ext> and the m68knommu version of the file is moved into the
> corresponding m68k directory and renamed <file>_no.<ext> and a small
> wrapper file <file>.<ext> is used to select between the two version. Files
> that are common to both but don't differ are removed from the m68knommu
> tree and files and directories that are unique to the m68knommu tree are
> moved to the m68k tree. Finally, the arch/m68knommu tree is removed.
>
> To select between the the versions of the files, the wrapper uses
>
> #ifdef CONFIG_MMU
> #include <file>_mm.<ext>
> #else
> #include <file>_no.<ext>
> #endif

On top of this file merge I have done a simplistic merge of m68k and
m68knommu Kconfig, which primarily attempts to keep existing options and
menus in place. Other than a handful of options being moved it produces
identical .config outputs on m68k and m68knommu targets I tested it on.

With this in place there is now quite a bit of scope for merge cleanups
in future patches.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
---
 arch/m68k/lib/memcpy.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 arch/m68k/lib/memcpy.c

(limited to 'arch/m68k/lib/memcpy.c')

diff --git a/arch/m68k/lib/memcpy.c b/arch/m68k/lib/memcpy.c
new file mode 100644
index 000000000000..b50dbcad4746
--- /dev/null
+++ b/arch/m68k/lib/memcpy.c
@@ -0,0 +1,62 @@
+
+#include <linux/types.h>
+
+void * memcpy(void * to, const void * from, size_t n)
+{
+#ifdef CONFIG_COLDFIRE
+  void *xto = to;
+  size_t temp;
+
+  if (!n)
+    return xto;
+  if ((long) to & 1)
+    {
+      char *cto = to;
+      const char *cfrom = from;
+      *cto++ = *cfrom++;
+      to = cto;
+      from = cfrom;
+      n--;
+    }
+  if (n > 2 && (long) to & 2)
+    {
+      short *sto = to;
+      const short *sfrom = from;
+      *sto++ = *sfrom++;
+      to = sto;
+      from = sfrom;
+      n -= 2;
+    }
+  temp = n >> 2;
+  if (temp)
+    {
+      long *lto = to;
+      const long *lfrom = from;
+      for (; temp; temp--)
+	*lto++ = *lfrom++;
+      to = lto;
+      from = lfrom;
+    }
+  if (n & 2)
+    {
+      short *sto = to;
+      const short *sfrom = from;
+      *sto++ = *sfrom++;
+      to = sto;
+      from = sfrom;
+    }
+  if (n & 1)
+    {
+      char *cto = to;
+      const char *cfrom = from;
+      *cto = *cfrom;
+    }
+  return xto;
+#else
+  const char *c_from = from;
+  char *c_to = to;
+  while (n-- > 0)
+    *c_to++ = *c_from++;
+  return((void *) to);
+#endif
+}
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